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    We synthesized complexes of Ni(II) with dithiocarbamate ligands derived from the ortho and para isomers of sulforhodamine B fluorophores and demonstrated they are highly selective in reactions with nitrogen dioxide (NO2). Compared with the para isomer, the ortho isomer showed a much greater fluorescence increase upon reaction with NO2, which led to oxidation and decomplexation of the dithiocarbamate ligand from Ni(II). We applied this probe for visual detection of 1 ppm NO2 in the gas phase and fluorescence imaging of NO2 in macrophage cells treated with a nitrogen dioxide donor.


    Yan Yan, Saarangan Krishnakumar, Huan Yu, Srinivas Ramishetti, Lih-Wen Deng, Suhua Wang, Leaf Huang, Dejian Huang. Nickel(II) dithiocarbamate complexes containing sulforhodamine B as fluorescent probes for selective detection of nitrogen dioxide. Journal of the American Chemical Society. 2013 Apr 10;135(14):5312-5

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    PMID: 23530626

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